[INFO] updating cached repository https://github.com/crazymykl/rust-koans [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 33d0906742ee7bdbed84e861874fc7fbc19e7c6b [INFO] checking crazymykl/rust-koans against try#662bf71cc5bbfe44a109ab5b7205e12ec319754c for pr-67531 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrazymykl%2Frust-koans" "/workspace/builds/worker-10/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/crazymykl/rust-koans on toolchain 662bf71cc5bbfe44a109ab5b7205e12ec319754c [INFO] running `"/workspace/cargo-home/bin/cargo" "+662bf71cc5bbfe44a109ab5b7205e12ec319754c" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/crazymykl/rust-koans [INFO] finished tweaking git repo https://github.com/crazymykl/rust-koans [INFO] tweaked toml for git repo https://github.com/crazymykl/rust-koans written to /workspace/builds/worker-10/source/Cargo.toml [INFO] crate git repo https://github.com/crazymykl/rust-koans already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+662bf71cc5bbfe44a109ab5b7205e12ec319754c" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+662bf71cc5bbfe44a109ab5b7205e12ec319754c" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] e4138ea02eec37ce1224eeeaa549585b7d5ba60926b63f647be8a0e87489156c [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `"docker" "start" "-a" "e4138ea02eec37ce1224eeeaa549585b7d5ba60926b63f647be8a0e87489156c"` [INFO] [stderr] Compiling koans v0.2.2 (/opt/rustwide/workdir) [INFO] [stderr] error: failed to run custom build command for `koans v0.2.2 (/opt/rustwide/workdir)` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/koans-adb25c2b03a878b4/build-script-build` (exit code: 101) [INFO] [stderr] --- stderr [INFO] [stderr] thread 'main' panicked at 'Read-only file system (os error 30)', build.rs:13:22 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x55b413506c54 - backtrace::backtrace::libunwind::trace::hd42437fd62966669 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x55b413506c54 - backtrace::backtrace::trace_unsynchronized::h0ae20d5385defeb5 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x55b413506c54 - std::sys_common::backtrace::_print_fmt::h894a1bdf0a2dfa40 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:84 [INFO] [stderr] 3: 0x55b413506c54 - ::fmt::hddc3494f848f9e38 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:61 [INFO] [stderr] 4: 0x55b41351f28c - core::fmt::write::h82684cbacf4572fd [INFO] [stderr] at src/libcore/fmt/mod.rs:1057 [INFO] [stderr] 5: 0x55b4135054d7 - std::io::Write::write_fmt::h4bd3be855b331f66 [INFO] [stderr] at src/libstd/io/mod.rs:1426 [INFO] [stderr] 6: 0x55b413508bbe - std::sys_common::backtrace::_print::hdadd72de21a0032c [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:65 [INFO] [stderr] 7: 0x55b413508bbe - std::sys_common::backtrace::print::hc9a2260feb2dd213 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:50 [INFO] [stderr] 8: 0x55b413508bbe - std::panicking::default_hook::{{closure}}::hfac9dc1510e753c1 [INFO] [stderr] at src/libstd/panicking.rs:193 [INFO] [stderr] 9: 0x55b4135088b1 - std::panicking::default_hook::hc7eafbac653c9df8 [INFO] [stderr] at src/libstd/panicking.rs:210 [INFO] [stderr] 10: 0x55b4135091eb - std::panicking::rust_panic_with_hook::h329f267bfc6e2a08 [INFO] [stderr] at src/libstd/panicking.rs:471 [INFO] [stderr] 11: 0x55b413508d9e - rust_begin_unwind [INFO] [stderr] at src/libstd/panicking.rs:375 [INFO] [stderr] 12: 0x55b413508ce0 - std::panicking::begin_panic_fmt::h428460d476924512 [INFO] [stderr] at src/libstd/panicking.rs:326 [INFO] [stderr] 13: 0x55b4135018a6 - build_script_build::main::h7fe5cfe704833b47 [INFO] [stderr] at /opt/rustwide/workdir/build.rs:13 [INFO] [stderr] 14: 0x55b413500fb0 - std::rt::lang_start::{{closure}}::h4ea78e2f8e7179c9 [INFO] [stderr] at /rustc/662bf71cc5bbfe44a109ab5b7205e12ec319754c/src/libstd/rt.rs:67 [INFO] [stderr] 15: 0x55b413508c83 - std::rt::lang_start_internal::{{closure}}::hbb1b07b87d5f3ad5 [INFO] [stderr] at src/libstd/rt.rs:52 [INFO] [stderr] 16: 0x55b413508c83 - std::panicking::try::do_call::h6e19ab244d86783a [INFO] [stderr] at src/libstd/panicking.rs:292 [INFO] [stderr] 17: 0x55b41350aa2a - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:78 [INFO] [stderr] 18: 0x55b413509680 - std::panicking::try::hdd1b28af511821c4 [INFO] [stderr] at src/libstd/panicking.rs:270 [INFO] [stderr] 19: 0x55b413509680 - std::panic::catch_unwind::h25a12636be762420 [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] 20: 0x55b413509680 - std::rt::lang_start_internal::ha1533bbeabcd97f0 [INFO] [stderr] at src/libstd/rt.rs:51 [INFO] [stderr] 21: 0x55b413500f89 - std::rt::lang_start::h11f45554bcdcdb9c [INFO] [stderr] at /rustc/662bf71cc5bbfe44a109ab5b7205e12ec319754c/src/libstd/rt.rs:67 [INFO] [stderr] 22: 0x55b413501a8a - main [INFO] [stderr] 23: 0x7f33115acb97 - __libc_start_main [INFO] [stderr] 24: 0x55b41350004a - _start [INFO] [stderr] 25: 0x0 - [INFO] [stderr] [INFO] running `"docker" "inspect" "e4138ea02eec37ce1224eeeaa549585b7d5ba60926b63f647be8a0e87489156c"` [INFO] running `"docker" "rm" "-f" "e4138ea02eec37ce1224eeeaa549585b7d5ba60926b63f647be8a0e87489156c"` [INFO] [stdout] e4138ea02eec37ce1224eeeaa549585b7d5ba60926b63f647be8a0e87489156c